CN217175884U - Sleeve connection reinforcing structure for unreserved dowel bars of assembled building conversion layer - Google Patents
Sleeve connection reinforcing structure for unreserved dowel bars of assembled building conversion layer Download PDFInfo
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- CN217175884U CN217175884U CN202121859648.6U CN202121859648U CN217175884U CN 217175884 U CN217175884 U CN 217175884U CN 202121859648 U CN202121859648 U CN 202121859648U CN 217175884 U CN217175884 U CN 217175884U
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Abstract
The utility model discloses a muffjoint reinforced structure that is used for assembled building conversion layer not to reserve the dowel, including prefabricated shear wall, cast-in-place shear wall and the floor of setting between prefabricated shear wall and cast-in-place shear wall, lack muscle sleeve periphery in the prefabricated shear wall and be provided with first chiseling district, be provided with second chiseling district and third chiseling district on floor and the cast-in-place shear wall that the first chiseling district corresponds respectively, lack muscle sleeve surface in the first chiseling district and be provided with back mend connecting reinforcement, back mend connecting reinforcement one end and pass second chiseling district to the third chiseling district in, first chiseling district, second chiseling district and third chiseling district link up and set up and pack and have the structure to consolidate the grout material; the number of the rear repair connecting steel bars is 2, and the outer walls of the two sides of the reinforcement-lacking sleeve along the length direction of the prefabricated shear wall are welded and fixed. The utility model discloses make full use of lacks muscle sleeve and upper end joint reinforcement's connection function, and is less to the destruction of primary structure, consolidates and connects simple and cost-controllable of structure.
Description
Technical Field
The utility model relates to an assembly type structure technical field, concretely relates to a muffjoint reinforced structure that is used for assembly type structure conversion layer not to reserve the dowel.
Background
In the assembled shear wall structure system, vertical prefabricated components (shear walls) are connected through sleeve grouting. The reserved dowel bars at the top of the lower prefabricated part are inserted into the sleeves at the bottom of the upper prefabricated part during standard layer construction, and grouting connection is dense. When the transfer floor is constructed, the dowel bars at the lower part need to be inserted and reserved in the cast-in-place beam and the cast-in-place plate, and the positioning accuracy is ensured. However, with the development of the sleeve grouting connection quality detection technology and the development of related detection work, when the first-layer assembly layer which is installed and constructed is detected, the situation that the dowel of the conversion layer is not reserved locally or even the whole layer is not reserved is found. Under this kind of condition, even the effect of connecting can't be played to the plump effect that also influences structure safety seriously in the sleeve. Therefore, it is necessary to reinforce the conversion layer of the prefabricated concrete structure without the reserved dowel bars.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a muffjoint reinforced structure for assembly type structure conversion layer does not reserve the dowel, make full use of sleeve and prefabricated end joint bar's connection function, it is less to the destruction of primary structure, consolidates simple and cost-controllable of connected mode.
In order to solve the technical problem, the utility model provides a muffjoint reinforced structure that is used for assembled building conversion layer not to reserve the dowel, including prefabricated shear wall, cast-in-place shear wall and the floor of setting between prefabricated shear wall and cast-in-place shear wall, lack muscle sleeve periphery in the prefabricated shear wall and be provided with first chisel removal district, floor and cast-in-place shear wall that first chisel removal district corresponds are provided with second chisel removal district and third chisel removal district respectively on, lack muscle sleeve surface in the first chisel removal district is provided with the benefit connecting reinforcement after, benefit connecting reinforcement one end after pass in second chisel removal district to the third chisel removal district, first chisel removal district, second chisel removal district and third chisel removal district link up the setting and fill with the structure and consolidate the grout material;
the number of the rear repair connecting steel bars is 2, and the outer walls of the two sides of the steel bar-lacking sleeve along the length direction of the prefabricated shear wall are welded and fixed.
And the reinforcement-lacking sleeve is filled with a sleeve grouting material for connecting reinforcement.
Further, the size range in first chisel district should make lack the length that muscle sleeve upwards exposes from the bottom and be no less than 7d, and d is the benefit connecting reinforcement diameter after, and guarantees that mend the connecting reinforcement after with lack muscle sleeve outer wall welding, and the benefit connecting reinforcement after and lack muscle sleeve respectively to first chisel and remove the distance between the district inner wall and be greater than and equal to 30 mm.
Further, the distance between the inner wall of the second chiseled area and each of the two post-repair connecting reinforcements is greater than or equal to 30 mm.
Further, the size range of the third chiseling area is such that the insertion depth of the after-repair connecting steel bars is not less than 20d, d is the diameter of the after-repair connecting steel bars, and the distance between the inner wall of the third chiseling area and each of the two after-repair connecting steel bars is greater than or equal to 30 mm.
Furthermore, the two rear repair connecting steel bars and the outer wall of the reinforcement-lacking sleeve are fixed through single-side lap welding, the welding surface of the single-side lap welding is parallel to the surface of the prefabricated shear wall, welding seams of the single-side lap welding on two sides of the reinforcement-lacking sleeve are symmetrically arranged, the welding length is not less than 6d, and d is the diameter of the rear repair connecting steel bar.
Furthermore, the sum of the sectional areas of the two rear-compensation connecting steel bars is larger than or equal to the sectional area of the upper-end connecting steel bar.
The utility model has the advantages that:
1. the utility model discloses make full use of lack the telescopic residual value of muscle, will fail to play the scarce muscle sleeve of connecting action with hypomere connecting reinforcement and remain, mend connecting reinforcement and scarce muscle sleeve welded connection through the back, lack muscle sleeve and mended the connecting reinforcement after with and acted as load biography power carrier, to prefabricated shear force wall only need lack in the muscle sleeve concrete chisel on every side of lower part remove can, reduced the concrete chisel and removed the volume, reduced the destruction to the primary structure.
2. The utility model applies the structure reinforcing grouting material to the repair and reinforcement of the connecting joint of the prefabricated concrete structure, utilizes the advantage of the distribution stress of the rear repair connecting steel bars at two sides and combines with the single-side lap welding, and greatly reduces the lap length of the rear repair connecting steel bars, thereby further reducing the workload of chiseling and removing concrete and repairing and reinforcing, and reducing the damage to the original structure; in addition, the structural reinforcement grouting material also has the characteristics of early strength and convenience in construction due to self-leveling, the repair reinforcement difficulty is greatly reduced, the repair reinforcement efficiency is improved, and the repair reinforcement comprehensive cost is finally reduced.
3. The utility model discloses a reinforced structure connection structure is simple, and it is clear and definite to pass the power route, construction convenience.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the present invention after chiseling and welding;
fig. 3 is a schematic view of the repair of the reinforcement-lacking sleeve of the present invention.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
Referring to fig. 1 and 2, an embodiment of the present invention relates to a sleeve connection reinforcement structure for prefabricated building transfer floor without reserved dowel bars, which comprises a prefabricated shear wall 1, a cast-in-place shear wall 2, and a floor slab 3 disposed between the prefabricated shear wall and the cast-in-place shear wall, wherein a bottom seam 4 is further disposed between the prefabricated shear wall and the floor slab, a first chiseling region 5 is disposed around a sleeve 10 lacking a bar in the prefabricated shear wall, a second chiseling region 6 and a third chiseling region 7 are disposed on the floor slab and the cast-in-place shear wall corresponding to the first chiseling region, a post-reinforcement connecting bar 8 is disposed on the sleeve surface lacking a bar in the first chiseling region, one end of the post-reinforcement connecting bar passes through the second chiseling region to the third chiseling region, the first chiseling region, the second chiseling region and the third chiseling region are arranged in a penetrating manner and filled with a structural reinforcement grouting material 9, wherein, when the first chiseling region is chiseling, and chiseling the corresponding bottom seam positions together preliminarily, so that the first chiseling area comprises the sum of the space at the periphery of the rib-lacking sleeve and the space of the corresponding bottom seam. The number of the rear repair connecting steel bars is 2, the outer walls of the two sides of the reinforcement-lacking sleeve in the length direction of the prefabricated shear wall are welded and fixed, the uniformity and reliability of stress transmission are guaranteed, the sum of the sectional areas of the two rear repair connecting steel bars is larger than or equal to the sectional area of the upper end connecting steel bar, and the equal-section conversion principle of force transmission of the steel bars is met. The inside of the reinforcement-lacking sleeve is filled with sleeve grouting material for connecting reinforcement bars, so that the connection performance between the reinforcement-lacking sleeve and the upper end connecting reinforcement bars is ensured.
The size range in above-mentioned first chisel removal district should make lack muscle sleeve from the bottom upwards expose be no less than 7 d's length, and d is mended the connecting reinforcement diameter after for, and guarantee after mend connecting reinforcement and lack muscle sleeve outer wall welding, the distance that the connecting reinforcement was mended to after with lack muscle sleeve respectively to first chisel removal district inner wall is greater than and is equal to 30 mm. And the distances between the inner wall of the second chiseling area and the two rear complementary connecting reinforcing steel bars are both more than or equal to 30 mm. The size range of the third chiseling area is such that the insertion depth of the post-compensation connecting steel bars is not less than 20d, d is the diameter of the post-compensation connecting steel bars, and the distance between the inner wall of the third chiseling area and the two post-compensation connecting steel bars is greater than or equal to 30 mm. And the two rear repair connecting steel bars and the outer wall of the reinforcement-lacking sleeve are fixed through single-side lap welding, the welding surface of the single-side lap welding is parallel to the surface of the prefabricated shear wall, the welding seams of the single-side lap welding on the two sides of the reinforcement-lacking sleeve are symmetrically arranged, the welding length is not less than 6d, and d is the diameter of the rear repair connecting steel bar. Prescribe a limit to in order to satisfy the joint strength demand through the size, single face overlap welding simple operation, the high-speed joint of being convenient for combines together welded connection and structure reinforcement grout material anchor and has also reduced the cutting area, reduces the injury to the component destruction.
Specifically, because in actual working condition, there are two kinds of circumstances of grouted and not grouted in lacking the muscle sleeve, give two kinds of construction methods to two kinds of circumstances:
the grouting material exists in the sleeve without ribs, and the grouting material does not need to be supplemented, and the method comprises the following steps:
step 1) chiseling concrete around the middle lower part of the bar-lacking sleeve from one side of the bar-lacking sleeve close to the surface of the prefabricated shear wall, so that the bar-lacking sleeve is exposed upwards from the bottom for a length of not less than 7d, and a first chiseling area is obtained;
step 2), chiseling concrete of a floor slab below the reinforcement-lacking sleeve and concrete at the upper end of the cast-in-place shear wall, and chiseling the upper end of the cast-in-place shear wall downwards for a depth of not less than 20d to obtain a second chiseling area and a third chiseling area;
step 3) cleaning the surface of the exposed part of the sleeve with the ribs;
step 4), connecting the upper-section connecting parts of the two rear repair connecting steel bars with the outer walls of the two sides of the reinforcement-lacking sleeve along the length direction of the prefabricated shear wall by adopting single-side lap welding, inserting the lower sections of the two rear repair connecting steel bars into a third chiseling area at the upper end of the cast-in-place shear wall after passing through the second chiseling area, wherein the inserting length in the cast-in-place shear wall is not less than 20 d;
step 5) further trimming the first chiseling area, the second chiseling area and the third chiseling area to ensure that the distances from the exposed part of the bar-lacking sleeve and the surface of the post-repair connecting steel bar to the inner wall of the corresponding area are not less than 30 mm to obtain an area to be repaired;
step 6) cleaning concrete scraps in the area to be repaired, and installing templates 11 on the surfaces of the prefabricated shear wall and the floor slab corresponding to the area to be repaired and the bottom surfaces of the cast-in-place shear wall and the floor slab;
step 7) pouring a structural reinforcing grouting material into the cavity of the area to be repaired, and curing and forming;
step 8) removing the template, detecting whether the grout in the rib-lacking sleeve is full, directly performing the next step if the grout is full, and performing grout supplementation through a grout outlet of the rib-lacking sleeve by using an injector if the grout is not full, and directly performing the next step after the grout supplementation is completed;
and 9) finishing reinforcement.
(II) no grouting material exists in the sleeve without ribs, and the grouting is needed to be supplemented, and the method comprises the following steps:
step 1) chiseling concrete around the middle lower part of the bar-lacking sleeve from one side of the bar-lacking sleeve close to the surface of the prefabricated shear wall, so that the bar-lacking sleeve is exposed from the bottom to the top for at least 7d to obtain a first chiseling area, and if the grouting external PVC extension pipe is positioned on one chiseling side, the grouting external PVC extension pipe is removed together for facilitating chiseling work when concrete on the outer side of the bar-lacking sleeve is chiseled;
step 2), chiseling floor concrete below the sleeve with the broken ribs and concrete at the upper end of the cast-in-place shear wall, wherein the chiseling depth of the upper end of the cast-in-place shear wall is not less than 20 d;
step 3) cleaning the surface of the exposed part of the sleeve with the ribs;
step 4), connecting the upper-section connecting parts of the two rear repair connecting steel bars with the outer walls of the two sides of the reinforcement-lacking sleeve along the length direction of the prefabricated shear wall by adopting single-side lap welding, and enabling the lower sections of the two rear repair connecting steel bars to penetrate into an upper end rejection area of the cast-in-place shear wall, wherein the penetration length is not less than 20 d;
step 5) further trimming the first chiseling area, the second chiseling area and the third chiseling area to ensure that the distances from the exposed part of the bar-lacking sleeve and the surface of the post-repair connecting steel bar to the inner wall of the corresponding area are not less than 30 mm to obtain an area to be repaired;
step 6) cleaning concrete fragments in the area to be repaired, plugging the bottom of the sleeve by using a flexible sealing material, and connecting a new grouting external PVC extension pipe 12 to the grouting port of the reinforcement-lacking sleeve if the grouting external PVC extension pipe is removed in the step 1);
installing templates 11 on the surfaces of the prefabricated shear wall and the floor slab corresponding to the area to be repaired and the bottom surfaces of the cast-in-place shear wall and the floor slab;
if a new externally connected pvc extension pipe is installed, its length should be ensured to be exposed outside the formwork, as shown in fig. 3;
step 7) pouring a structural reinforcing grouting material into the cavity of the area to be repaired, and curing and forming;
step 8), removing the template, and grouting into the defective sleeve through the pvc extension pipe;
step 9) detecting whether grouting in the rib-lacking sleeve is full, if the grouting is full, directly carrying out the next step, and if the grouting is not full, adopting an injector to carry out grouting through a grout outlet of the rib-lacking sleeve, and directly carrying out the next step after grouting is completed;
and step 10) finishing reinforcement.
The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (6)
1. A sleeve connection reinforcing structure for an assembled building conversion layer without reserved joint bars is characterized by comprising a prefabricated shear wall, a cast-in-place shear wall and a floor slab arranged between the prefabricated shear wall and the cast-in-place shear wall, wherein a first chiseling area is arranged on the periphery of a sleeve with a bar lacking in the prefabricated shear wall, the sleeve with the bar lacking is connected with a connecting steel bar at the upper end in a matched mode, a second chiseling area and a third chiseling area are respectively arranged on the floor slab and the cast-in-place shear wall corresponding to the first chiseling area, a post-repair connecting steel bar is arranged on the surface of the sleeve with the bar lacking in the first chiseling area, one end of the post-repair connecting steel bar penetrates through the second chiseling area to the third chiseling area, and the first chiseling area, the second chiseling area and the third chiseling area are arranged in a penetrating mode and filled with a structural reinforcing grouting material;
the number of the rear repair connecting steel bars is 2, and the outer walls of the two sides of the reinforcement-lacking sleeve along the length direction of the prefabricated shear wall are welded and fixed;
and the reinforcement-lacking sleeve is filled with a sleeve grouting material for connecting reinforcement.
2. The muff-coupling reinforcement structure for an unreserved tendon of an assembly type building conversion layer according to claim 1, wherein the size range of the first chiseling region is such that the tendon-lacking sleeve is exposed from the bottom to the top for a length of not less than 7d, d is a diameter of the post-reinforcement connecting steel bar, and after the post-reinforcement connecting steel bar is welded to the outer wall of the tendon-lacking sleeve, the distance between the post-reinforcement connecting steel bar and the tendon-lacking sleeve to the inner wall of the first chiseling region is greater than or equal to 30 mm.
3. The muff-coupling reinforcement structure for an unreserved tendon of an assembly building conversion layer of claim 1, wherein the distance between the inner wall of the second chiseled region and each of the two rear reinforcing bars is greater than or equal to 30 mm.
4. The muff-coupling reinforcement structure for an unreserved tendon of an assembly type building conversion layer according to claim 1, wherein the size of the third chiseled region is in a range such that the insertion depth of the rear reinforcing bars is not less than 20d, d is the diameter of the rear reinforcing bars, and the distance between the inner wall of the third chiseled region and each of the two rear reinforcing bars is greater than or equal to 30 mm.
5. The muff-coupling reinforcing structure for the prefabricated building conversion layer without the dowel of claim 1, wherein two rear repair connecting steel bars are fixed with the outer wall of the sleeve without the dowel by single-side lap welding, the welding surface of the single-side lap welding is parallel to the surface of the prefabricated shear wall, the welding seams of the single-side lap welding on two sides of the sleeve without the dowel are symmetrically arranged, the welding length is not less than 6d, and d is the diameter of the rear repair connecting steel bar.
6. The muff-coupling reinforcement structure for an unreserved tendon for an assembly building conversion layer of claim 1, wherein a sum of sectional areas of the two rear reinforcing connecting tendons is greater than or equal to a sectional area of the upper connecting tendon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121859648.6U CN217175884U (en) | 2021-08-10 | 2021-08-10 | Sleeve connection reinforcing structure for unreserved dowel bars of assembled building conversion layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121859648.6U CN217175884U (en) | 2021-08-10 | 2021-08-10 | Sleeve connection reinforcing structure for unreserved dowel bars of assembled building conversion layer |
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| Publication Number | Publication Date |
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| CN217175884U true CN217175884U (en) | 2022-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121859648.6U Active CN217175884U (en) | 2021-08-10 | 2021-08-10 | Sleeve connection reinforcing structure for unreserved dowel bars of assembled building conversion layer |
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- 2021-08-10 CN CN202121859648.6U patent/CN217175884U/en active Active
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